Infra-red intruder detector



FIG. 1 is a perspective view of an infra-red intruder detector showing our new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a side elevational view thereof;

FIG. 5 is a rear elevational view thereof;

FIG. 6 is a side elevational view (opposite to the view shown in FIG. 4) thereof; and,

FIG. 7 is a bottom plan view thereof. 

The ornamental design for an infra-red intruder detector, as shown and described. 